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List of figures Figure 2.1 – Dimensionless equilibrium isotherm showing the meaning of “favorable”, “linear” and “unfavorable” ..............................................................................................................4 Figure 2.2 – The sequence of steps in the basic Skarstrom PSA cycle adapted from Pressure Swing Adsorption [10].............................................................................................................6 Figure 4.1 – Adsorption bed layout on the left and dialog box on the right................................... 18 Figure 4.2 – Connections between isotherm model, adsorption bed model and multilayer model ....... 19 Figure 4.3 Comparison of a breakthrough simulation with gPROMS® model for a mixture of hydrogen and methane using 10, 40 and 80 discretization points per layer .............................................. 24 Figure 4.4 - Comparison between the simulation and experimental breakthrough curves for pressures of 4, 10 and 16 atm for a binary mixture of H2/CH4 at a feed flow rate of 6.8 SLPM ........................... 25 Figure 4.5 - Effect of the feed flow rate in the experimental and simulated breakthrough curves for a binary mixture of H2/CH4 at a feed pressure of 10 atm ......................................................... 25 Figure 4.6 - Comparison of the results obtained for a feed pressure of 16 atm using different activity model for a binary mixture of hydrogen and methane ........................................................... 26 Figure 4.7 – Effect of the feed pressure at a feed flow rate of 6.8 SLPM on the left and effect of the feed flow rate at a feed pressure of 10 atm on the right in the breakthrough for a binary mixture of hydrogen and carbon monoxide ....................................................................................... 27 Figure 4.8 – Breakthrough of the H2/CO2 mixture at 10 atm and a feed flow rate of 6.8 SLPM and respective loading profile for t = 1400 s............................................................................. 28 Figure 4.9 – Comparison of the results between the simulation with gPROMS and experimental data for the breakthrough of the H2/CO2 mixture at 10 atm and 6.8 SLPM .............................................. 29 Figure 4.10 – Breakthrough curve for a 0.5 activated carbon ratio with the time axis in logarithmic scale .............................................................................................................................. 30 Figure 4.11 – gPROMS® results: on the left breakthrough for a 0.32cr and on the right breakthrough for 0.65 cr ..................................................................................................................... 31 Figure 4.12 – gPROMS simulation a bed containing activated carbon at 6.5 bar and feed flow rate of 5 SLPM........................................................................................................................ 32 Figure 4.13 - Breakthrough of a 5 component mixture with a 0.7 layer of activated carbon and 0.3 layer of zeolite: on the left, feed pressure of 6.5 bar and on the right feed a feed pressure of 8 bar ......... 33 Figure 4.14 – Breakthrough curve obtained with gPROMS® model employing the Multisite Langmuir isotherm ................................................................................................................... 35 Figure 4.15 – On the left: temperature profile of the column and on the right the loading profile of methane both at the end of the feed step.......................................................................... 36 Figure 4.16 – Comparison of the loading profiles with different adsorbent geometries .................... 37 Pressure Swing Adsorption for Hydrogen Purification ivPDF Image | PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN
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